A Ti-50Al alloy has been prepared by vacuum pressure casting.The full lamellar microstructure (FL) has been formed upon heat treating at 1400 ℃ and then furnace cooling.The frictional wear behavior of the alloy at th...A Ti-50Al alloy has been prepared by vacuum pressure casting.The full lamellar microstructure (FL) has been formed upon heat treating at 1400 ℃ and then furnace cooling.The frictional wear behavior of the alloy at the room temperature has been tested and its wear mechanism has been studied.The results show that with the increase of the load and sliding speed,the wear rate of the as-cast Ti-50Al alloy rises and the friction coefficient declines.When sliding speed is lower than 1.0 m/s the wear rate of the FL Ti-50Al alloy increased with the load and sliding speed,but the friction coefficient is relatively invariable at about 0.5.The wear mechanism is mainly of abrasive wear and adhesive wear.When sliding speed is higher than 1.5 m/s,the wear mechanism has changed to mainly oxidization wear so that the wear rate of the FL Ti-50Al alloy declines significantly and the friction coefficient increases.Compared to the as-cast alloy,the FL Ti-50Al alloy has better wear resistance.展开更多
利用磁控溅射技术制备CrTiA lN、TiN及类石墨(G raph ite L ike Carbon)硬质镀层,以高速钢为对比,通过摩擦因数及磨损形貌等研究不同镀层与纯铜的干摩擦磨损性能。结果表明,镀层的摩擦因数是决定与纯铜摩擦磨损性能的首要因素,摩擦因数...利用磁控溅射技术制备CrTiA lN、TiN及类石墨(G raph ite L ike Carbon)硬质镀层,以高速钢为对比,通过摩擦因数及磨损形貌等研究不同镀层与纯铜的干摩擦磨损性能。结果表明,镀层的摩擦因数是决定与纯铜摩擦磨损性能的首要因素,摩擦因数越小,摩擦副之间的磨损性能越好;而与纯铜对磨时,摩擦副的摩擦因数取决于组成摩擦副材料之间的润湿性,材料的润湿性越差,则摩擦因数越低,因此具有减摩耐磨的GLC碳膜是与工业纯铜对磨的最佳镀层。展开更多
文摘A Ti-50Al alloy has been prepared by vacuum pressure casting.The full lamellar microstructure (FL) has been formed upon heat treating at 1400 ℃ and then furnace cooling.The frictional wear behavior of the alloy at the room temperature has been tested and its wear mechanism has been studied.The results show that with the increase of the load and sliding speed,the wear rate of the as-cast Ti-50Al alloy rises and the friction coefficient declines.When sliding speed is lower than 1.0 m/s the wear rate of the FL Ti-50Al alloy increased with the load and sliding speed,but the friction coefficient is relatively invariable at about 0.5.The wear mechanism is mainly of abrasive wear and adhesive wear.When sliding speed is higher than 1.5 m/s,the wear mechanism has changed to mainly oxidization wear so that the wear rate of the FL Ti-50Al alloy declines significantly and the friction coefficient increases.Compared to the as-cast alloy,the FL Ti-50Al alloy has better wear resistance.
文摘利用磁控溅射技术制备CrTiA lN、TiN及类石墨(G raph ite L ike Carbon)硬质镀层,以高速钢为对比,通过摩擦因数及磨损形貌等研究不同镀层与纯铜的干摩擦磨损性能。结果表明,镀层的摩擦因数是决定与纯铜摩擦磨损性能的首要因素,摩擦因数越小,摩擦副之间的磨损性能越好;而与纯铜对磨时,摩擦副的摩擦因数取决于组成摩擦副材料之间的润湿性,材料的润湿性越差,则摩擦因数越低,因此具有减摩耐磨的GLC碳膜是与工业纯铜对磨的最佳镀层。
